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Cerebellar RNA levels of IDO, SIV, IFN-γ, and TNF-α. Relative mRNA levels were quantified by real-time RT-PCR. The y axis indicates ddCT (log2 relative units). IDO (A), SIV (B), IFN-γ (C), and TNF-α (D) expression levels are significantly higher in animals with rapidly progressive AIDS (group C) than in chronically infected animals (group B). No expression is found in controls (group A).
